Gaya APA

Keene, C. (1997). Nancy Drew Mysteries Stories: the Riddle of the Ruby Gazalle (Cet. 1. --). New York: Pocket Books.

Gaya MLA

Keene, Carolyn. "Nancy Drew Mysteries Stories: the Riddle of the Ruby Gazalle". Cet. 1. -- New York: Pocket Books, 1997. Text.